Collision Induced Relaxations within the Antiprotonic Helium Hyperfine Structure (2009)
Pask, T., Barna, D., Dax, A., Friedreich, S., Hayano, R. S., Hori, M., ...
We report the first measurements of the inelastic spin exchange collision rate between the Hyperfine (HF) levels of antiprotonic helium. We measure the time dependent evolution of the (37, 35)...
Technical Design Report for the PANDA Solenoid and Dipole Spectrometer Magnets (2009)
Keshelashvili, I., Krusche, B., Steinacher, M., Heng, Y., Liu, Z., ...
This document is the Technical Design Report covering the two large spectrometer magnets of the PANDA detector set-up. It shows the conceptual design of the magnets and their anticipated performance....
Antiproton magnetic moment determined from the HFS of antiprotonic helium (2009)
Pask, T., Barna, D., Dax, A., Hayano, R. S., Hori, M., Horváth, D., ...
We report a determination of the antiproton magnetic moment, measured in a three-body system, independent of previous experiments. We present results from a systematic study of the hyperfine (HF)...
Physics Performance Report for PANDA: Strong Interaction Studies with Antiprotons (2009)
Erni, PANDA Collaboration: W., Keshelashvili, I., Krusche, B., Steinacher, M., Heng, Y., Liu, Z., ...
To study fundamental questions of hadron and nuclear physics in interactions of antiprotons with nucleons and nuclei, the universal PANDA detector will be built. Gluonic excitations, the physics of...
Antiproton magnetic moment determined from the HFS of pHe+ (2009)
Pask, T., Barna, D., Dax, A., Hayano, R. S., Hori, Masaki, Horváth, D., ...
Benabderrahmane, M. L., Herrmann, N., Wisniewski, K., Kecskemeti, J., Andronic, A., Barret, V., ...
The K0 meson production by pi- mesons of 1.15 GeV/c momentum on C, Al, Cu, Sn and Pb nuclear targets was measured with the FOPI spectrometer at the SIS accelerator of GSI. Inclusive production...
Petrascu, C. Curceanu, Bartalucci, S., Bertolucci, S., Bragadireanu, M., Cargnelli, M., Catitti, M., ...
The Pauli Exclusion Principle is one of the basic principles of modern physics and is at the very basis of our understanding of matter: thus it is fundamental importance to test the limits of its...
Improved Study of the Antiprotonic Helium Hyperfine Structure (2008)
Pask, T., Barna, D., Dax, A., Hayano, R. S., Hori, M., Horváth, D., ...
We report the initial results from a systematic study of the hyperfine (HF) structure of antiprotonic helium (n,l) = (37,~35) carried out at the Antiproton Decelerator (AD) at CERN. We performed a...
New precision measurements of the strong interaction in kaonic hydrogen (2008)
Bazzi, M., Beer, G., Bombelli, L., Bragadireanu, A. M., Cargnelli, M., Catitti, M., ...
Collisional Effects on the Antiprotonic Helium Hyperfine Structure Measurement (2008)
Pask, T., Barna, D., Dax, A., Hayano, R. S., Hori, Masaki, Horváth, D., ...
Improved study of the antiprotonic helium hyperfine structure (2008)
Pask, T., Barna, D., Dax, A., Hayano, R. S., Hori, M., Horváth, D., ...
$\Lambda N$ correlations from the stopped $K^-$ reaction on ${}^4$He (2007)
Suzuki, T., Bhang, H., Chiba, J., Choi, S., Fukuda, Y., Hanaki, T., ...
We have investigated correlations of coincident $\Lambda N$ pairs from the stopped $K^-$ reaction on ${}^4$He, and clearly observed $\Lambda p$ and $\Lambda n$ branches of the two-nucleon absorption...
EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH CERN--PPE/94-213 7 December 1994 (2007)
Phase And Density, E. Widmann, I. Sugai, T. Yamazaki, R. S. Hayano, M. Iwasaki, ...
Systematic studies of the phase and density dependence of the delayed annihilation time spectra of antiprotons (DATS) in gaseous, liquid and solid helium have been performed using the Low Energy...
$\Lambda d$ correlations from the $^4$He(stopped-$K^-$,$d$) reaction (2007)
Suzuki, T., Bhang, H., Chiba, J., Choi, S., Fukuda, Y., Hanaki, T., ...
We have observed an intense high-energy component in an inclusive $^4$He(stopped $K^-$, $d$) spectrum. For back-to-back $\Lambda d$ pairs a prominent event cluster has been found just below the...
Search for strange tribaryon states in the inclusive ^4He(K^{-}_{stopped}, p) reaction (2007)
Sato, M., Bhang, H., Chiba, J., Choi, Seonho, Fukuda, Y., Hanaki, T., ...
A search for tribaryon states was performed at KEK-PS. We adopted the $^4$He($K^-_{stopped}, p)$ reaction to populate the states with strangeness -1, charge 0 and isospin 1. No significant narrow...
Precision measurement of the $3d \to 2p$ x-ray energy in kaonic $^4$He (2007)
Okada, S., Beer, G., Bhang, H., Cargnelli, M., Chiba, J., Choi, Seonho, ...
We have measured the Balmer-series x-rays of kaonic $^4$He atoms using novel large-area silicon drift x-ray detectors in order to study the low-energy $\bar{K}$-nucleus strong interaction. The energy...
Search for a kaonic nuclear state via $^4$He$(K^-, N)$ (2007)
Iwasaki, M., Bhang, H., Chiba, J., Choi, S., Fukuda, Y., Hanaki, T., ...
Very recently, we have performed a couple of experiments, {\it{KEK PS-E549/E570}}, for the detailed study of the strange tribaryon $S^0(3115)$ obtained in {\it{KEK PS-E471}}. These experiments were...
Neutron density distributions from antiprotonic 208Pb and 209Bi atoms (2007)
Klos, B, Brown, B A, Czosnyka, T, Gulda, K, Hartmann, F J, Jastrzebski, J J, ...
The X-ray cascade from antiprotonic atoms was studied for 208Pb and 209Bi. Widths and shifts of the levels due to the strong interaction were determined. Using modern antiproton-nucleus optical...
Neutron density distributions from antiprotonic 208Pb and 209Bi atoms (2007)
Klos, B., Trzcinska, A., Jastrzebski, J., Czosnyka, T., Kisielinski, M., Lubinski, P., ...
The X-ray cascade from antiprotonic atoms was studied for 208Pb and 209Bi. Widths and shifts of the levels due to the strong interaction were determined. Using modern antiproton-nucleus optical...
Precision measurements of kaonic atoms at DAΦNE and future perspectives (2007)
Curceanu, C., Bazzi, M., Beer, G., Bombelli, L., Bragadireanu, A. M., Cargenelli, M., ...
Experimental studies on kaonic atoms at DAΦNE (2007)
Zmeskal, J., Bazzi, M., Beer, G., Bombelli, L., Bragadirean, A. M., Cargnelli, M., ...
Kaonic hydrogen X-rays experiments at DAFNE (2007)
Cargnelli, M., Ishiwatari, T., Kienle, P., Marton, J., Widmann, E., Zmeskal, J., ...
Bartalucci, S., Bertolucci, S., Bragadireanu, M., Cargnelli, M., Catitti, M., Curceanu, C., ...
The Pauli exclusion principle (PEP) represents one of the basic principles of modern physics and, even if there are no compelling reasons to doubt its validity, it still spurs a lively debate,...
Phenomenological model of the Kaonic Nuclear Cluster K^-pnn in the ground state (2006)
Ivanov, A. N., Kienle, P., Marton, J., Widmann, E.
A phenomenological model, proposed for the Kaonic Nuclear Cluster (KNC) K^-pp, is applied to the theoretical analysis of the KNC K^-pnn (or S^0). The theoretical values of the binding energy and the...
VIP: An Experiment to Search for a Violation of the Pauli Exclusion Principle (2006)
Bartalucci, S., Bertolucci, S., Bragadireanu, M., Cargnelli, M., Catitti, M., Curceanu, C., ...
The Pauli Exclusion Principle is a basic principle of Quantum Mechanics, and its validity has never been seriously challenged. However, given its fundamental standing, it is very important to check...
Phenomenological model of the Kaonic Nuclear Cluster K^-pp in the ground state (2005)
Ivanov, A. N., Kienle, P., Marton, J., Widmann, E.
A phenomenological model is proposed for the analysis of the properties of the Kaonic Nuclear Cluster (KNC) Kpp in its ground state. Inside the KNC K^-pp we describe the relative motion of the...
Bartalucci, S., Bertolucci, S., Bragadireanu, M., Bucci, C., Cargnelli, M., Catitti, M., ...
The Pauli Exclusion Principle (PEP) is a basic principle of Quantum Mechanics, and its validity has never been seriously challenged. However, given its importance, it is very important to check it as...
A search for deeply bound kaonic nuclear states (2005)
Suzuki, T., Bhang, H., Franklin, G., Gomikawa, K., Hayano, R. S., Hayashi, T., ...
We have measured proton and neutron energy spectra by stopping negative kaons on liquid helium4. Two distinct peak structures were found on both spectra, which were assigned to the formation of new...
Barna, D, Caspers, Friedhelm, Eades, John, Gilg, H, Hayano, R S, Hori, Masaki, ...
For the precise measurement of the hyperfine structure of antiprotonic helium microwave radiation of 12.9 GHz frequency is needed, tunable over ±100 MHz. A cylindrical microwave cavity is used whose...
Barna, D, Caspers, Friedhelm, Eades, John, Gilg, H, Hayano, R S, Hori, Masaki, ...
For the precise measurement of the hyperfine structure of antiprotonic helium microwave radiation of 12.9 GHz frequency is needed, tunable over ±100 MHz. A cylindrical microwave cavity is used whose...
A Facility for Low-energy Antiproton and Ion Research (2004)
The future accelerator facility for beams of ions and antiprotons at Darmstadt will provide antiproton beams of intensities that are two orders of magnitude higher than currently available. Within...
Systematic study of the decay rates of antiprotonic helium states (2004)
Yamaguchi, H, Hayano, R S, Ishikawa, T, Sakaguchi, J, Widmann, E, Eades, John, ...
A systematic study of the decay rates of antiprotonic helium (\pbhef and \pbhet) at CERN AD (Antiproton Decelerator) has been made by a laser spectroscopic method. The decay rates of some of its...
Systematic study of the decay rates of antiprotonic helium states (2004)
Yamaguchi, H., Hayano, R. S., Ishikawa, T., Sakaguchi, J., Widmann, E., Eades, J., ...
A systematic study of the decay rates of antiprotonic helium (\pbhef and \pbhet) at CERN AD (Antiproton Decelerator) has been made by a laser spectroscopic method. The decay rates of some of its...
Indication of a strange tribaryon S^+ from the ^4He(stopped K^-,n) reaction (2003)
Iwasaki, M., Suzuki, T., Bhang, H., Franklin, G., Gomikawa, K., Hayano, R. S., ...
We measured the neutron time-of-flight spectrum in the ^4He(stopped K^-, n) reaction by stopping negative kaons in a superfluid helium target. A clear enhancement was observed in the neutron...
Yamaguchi, H, Eades, John, Hayano, R S, Hori, Masaki, Horváth, D, Ishikawa, T, ...
We have measured twelve transition frequencies of the antiprotonic helium atom (pbar-He+) with precisions of 0.1--0.2 ppm using a laser spectroscopic method. The agreement between the experiment and...
Yamaguchi, H., Eades, J., Hayano, R. S., Hori, M., Horvath, D., Ishikawa, T., ...
We have measured twelve transition frequencies of the antiprotonic helium atom (pbar-He+) with precisions of 0.1--0.2 ppm using a laser spectroscopic method. The agreement between the experiment and...
High Precision Laser and Microwave Spectroscopy of Antiprotonic Helium (2002)
This talk gives an overview of the recent results on the precision spectroscopy of antiprotonic helium which was performed by the ASACUSA collaboration at the Antiproton Decelerator of CERN. The...
High Precision Laser and Microwave Spectroscopy of Antiprotonic Helium (2002)
This talk gives an overview of the recent results on the precision spectroscopy of antiprotonic helium which was performed by the ASACUSA collaboration at the Antiproton Decelerator of CERN. The...
Widmann, E, Hayano, R S, Ishikawa, T, Sakaguchi, J, Tasaki, T, Yamaguchi, H, ...
Using a newly developed laser-microwave-laser resonance method, we observed a pair of microwave transitions between hyperfine levels of the $(n,L)=(37,35)$ state of antiprotonic helium. This...
Widmann, E., Hayano, R. S., Ishikawa, T., Sakaguchi, J., Tasaki, T., Yamaguchi, H., ...
Using a newly developed laser-microwave-laser resonance method, we observed a pair of microwave transitions between hyperfine levels of the $(n,L)=(37,35)$ state of antiprotonic helium. This...
Schmidt, R, Trzcinska, A, Czosnyka, T, Von Egidy, T, Gulda, K, Hartmann, F J, ...
The x-ray cascade from antiprotonic atoms was studied for 106Cd, 116Cd, 112Sn, 116Sn, 120Sn, and 124Sn. Widths and shifts of the levels due to strong interaction were deduced. Isotopic effects in the...
Schmidt, R., Trzcinska, A., Czosnyka, T., Von Egidy, T., Gulda, K., Hartmann, F. J., ...
The x-ray cascade from antiprotonic atoms was studied for 106Cd, 116Cd, 112Sn, 116Sn, 120Sn, and 124Sn. Widths and shifts of the levels due to strong interaction were deduced. Isotopic effects in the...
Information on antiprotonic atoms and the nuclear periphery from the PS209 experiment (2001)
Trzcinska, A., Jastrzebski, J., Czosnyka, T., Von Egidy, T., Gulda, K., Hartmann, F. J., ...
In the PS209 experiments at CERN two kinds of measurements were performed: the in-beam measurement of X-rays from antiprotonic atoms and the radiochemical, off-line determination of the yield of...
Hyperfine Structure Measurements of Antiprotonic Helium and Antihydrogen (2001)
Widmann, E, Eades, John, Hayano, R S, Hori, Masaki, Horváth, D, Ishikawa, T, ...
This paper describes measurements of the hyperfine structure of two antiprotonic atoms that are planned at the Antiproton Decelerator (AD) at CERN. The first part deals with antiprotonic helium, a...
Hyperfine Structure Measurements of Antiprotonic Helium and Antihydrogen (2001)
Widmann, E., Eades, J., Hayano, R. S., Hori, M., Horvath, D., Ishikawa, T., ...
This paper describes measurements of the hyperfine structure of two antiprotonic atoms that are planned at the Antiproton Decelerator (AD) at CERN. The first part deals with antiprotonic helium, a...
Hyperfine Structure Measurements of Antiprotonic Helium and Antihydrogen (2001)
Widmann, E, Eades, John, Hayano, R S, Hori, Masaki, Horváth, D, Ishikawa, T, ...
This paper describes measurements of the hyperfine structure of two antiprotonic atoms that are planned at the Antiproton Decelerator (AD) at CERN. The first part deals with antiprotonic helium, a...
Experimental studies of antiprotonic helium (1999)
This talk describes the experimental studies of metastable antiprotonic helium "atomcules" pHe/sup +/ (a neutral exotic atom consisting of a helium nucleus, an antiproton and an electron) performed...
Ketzer, B, Hartmann, F J, Von Egidy, T, Maierl, C, Pohl, R, Eades, John, ...
Laser resonance transitions between normally metastable states of antiprotonic helium atoms were induced making use of state dependent quenching effects caused by trace admixtures of \mbox{H$_2$}\ to...
Ketzer, B, Hartmann, F J, Von Egidy, T, Maierl, C, Pohl, R, Eades, John, ...
Laser resonance transitions between normally metastable states of antiprotonic helium atoms were observed making use of state dependent quenching effects caused by small admixtures of \htwo\...
Antiprotonic investigation of the nuclear periphery (1997)
Jastrzebski, J., Czosnyka, T., Von Egidy, T., Gulda, K., Hartmann, F.J., Iwanicki, J., ...
Antiprotonic investigation of the nuclear periphery (1997)
Jastrzebski, J., Czosnyka, T., Von Egidy, T., Gulda, K., Hartmann, F.J., Iwanicki, J., ...
Yamazaki, T, Widmann, E, Eades, John, Kumakura, M, Morita, N, Torii, H A, ...
Very weak laser resonances of unfavoured transitions $(n,l) \rightarrow (n+1,l-1)$ have been observed in metastable \={p}$^4$He$^+$ atoms by using a pulsed antiproton beam. The observed wavelengths...
Yamazaki, T, Widmann, E, Eades, John, Kumakura, M, Morita, N, Torii, H A, ...
Very weak laser resonances of unfavoured transitions $(n,l) \rightarrow (n+1,l-1)$ have been observed in metastable \={p}$^4$He$^+$ atoms by using a pulsed antiproton beam. The observed wavelengths...
Antihydrogen production and precision experiments (1996)
Holzscheiter, M H, Bendiscioli, G, Bertin, A, Bollen, G, Bruschi, M, Cesar, C L, ...
Hayano, R S, Ishikawa, T, Tamura, H, Torii, H A, Hori, Masaki, Maas, F E, ...
A new laser-induced resonant transition in the $v=n-l-1=2$ metastable cascade of antiprotonic $^4$He atoms has been found by using a double resonance technique. This was done by setting the first...
Torii, H A, Hori, Masaki, Ishikawa, T, Maas, F E, Hayano, R S, Morita, N, ...
Laser-induced resonant transitions in metastable antiprotonic ^3He atoms have been found. The observed transitions at wavelengths 593.388 \pm 0.001~nm and at 463.947 \pm 0.002~nm have been...
Effects of impurity atoms and molecules on the lifetime of antiprotonic helium atoms (1995)
Widmann, E, Sugai, I, Yamazaki, T, Hayano, R S, Iwasaki, M, Nakamura, S N, ...
Delayed annihilation time spectra of antiprotons (DATS) in room temperature helium gas have been studied as a function of the concentration of admixed noble gases (Ne, Ar, Kr, Xe) as well as...
Ketzer, B, Hartmann, F J, Daniel, H, Von Egidy, T, Niestroj, A, Schmid, S, ...
The delayed annihilation time spectra (DATS) of antiprotonic helium atoms have been studied in isotopically pure low temperature ^3He and ^4He gas at various densities. The DATS taken at 5.8~K and...
Laser studies of the decay chain of metastable antiprotonic helium atoms (1994)
Hayano, R S, Maas, F E, Torii, H A, Morita, N, Kumakura, M, Yamazaki, T, ...
Delayed annihilation of antiprotons in helium gas (1993)
Nakamura, S N, Hayano, R S, Iwasaki, M, Shigaki, K, Widmann, E, Yamazaki, T, ...
Morita, N, Kumakura, M, Yamazaki, T, Widmann, E, Masuda, H, Sugai, I, ...
A naturally occurring trap for antiprotons (1993)
Eades, John, Morita, N, Ito, T M, Ito, Y, Kawachi, A, Nakamura, S N, ...